/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package studio.raptor.sqlparser.dialect.postgresql.ast.expr;

import studio.raptor.sqlparser.ast.SQLExpr;
import studio.raptor.sqlparser.ast.SQLExprImpl;
import studio.raptor.sqlparser.ast.expr.SQLLiteralExpr;
import studio.raptor.sqlparser.dialect.postgresql.visitor.PGASTVisitor;
import studio.raptor.sqlparser.visitor.SQLASTVisitor;

/**
 * Created by tianzhen.wtz on 2014/12/29 0029 16:10.
 * 类说明：
 */
public class PGIntervalExpr extends SQLExprImpl implements SQLLiteralExpr, PGExpr {

  private SQLExpr value;


  public SQLExpr getValue() {
    return value;
  }

  public void setValue(SQLExpr value) {
    this.value = value;
  }

  @Override
  public void accept0(PGASTVisitor visitor) {
    visitor.visit(this);
    visitor.endVisit(this);
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    PGIntervalExpr that = (PGIntervalExpr) o;

    if (value != null ? !value.equals(that.value) : that.value != null) {
      return false;
    }

    return true;
  }

  @Override
  public int hashCode() {
    return value != null ? value.hashCode() : 0;
  }

  @Override
  protected void accept0(SQLASTVisitor visitor) {
    this.accept0((PGASTVisitor) visitor);
  }
}
